-LRB- CNN -RRB- -- Fourteen thoroughbred horses dropped dead in a mysterious scene Sunday before a polo match near West Palm Beach , Florida , officials said .

Teams are trying to figure out what happened at the International Polo Club Palm Beach in Florida .

State and local veterinary teams are trying to figure out what happened at the International Polo Club Palm Beach in Wellington , Florida , as team Lechuza Caracas prepared to compete in a U.S. Open match .

Two horses initially collapsed , and as vets and team officials scrambled to revive them , five others became dizzy , said Tim O'Connor , spokesman for the polo club .

`` A total of seven died on our property , '' O'Connor told CNN . Seven other horses died en route to a Wellington horse farm and a veterinary hospital .

The cause of the deaths has not been determined , and necropsies and blood tests were underway , he said .

O'Connor said each team brings between 40 to 60 horses for matches , and they are continuously switched out throughout a match to keep the horses from overexerting themselves .

A meeting will be held to determine whether Lechuza Caracas will compete at a later date , he said .

`` Everybody is kind of in shock and trying to figure out what happened , '' he said . `` Nobody can recall an incident in which this many horses have died at once . ''

CNN 's Samira Simone contributed to this report .

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14 thoroughbred horses drop dead unexpectedly before a polo match

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Match set at the International Polo Club Palm Beach in Wellington , Florida

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Cause of deaths not determined ; necropsies and blood tests are underway

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Polo club spokesman : `` Everybody is kind of in shock ''